Color photographic recording material containing a non-diffusing, 2-equivalent coupler which, on coupling, forms a dye removable by rinsing

US6083675A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Peter Bell · Neunburg vorm Wald, DE
• Hans-Ulrich Borst · Elsdorf, DE
• Ralf Buscher · Lohmar, DE
• Jorg Siegel · Leverkusen, DE

Key dates

• Filing date: Mar 19, 1998
• Grant date: Jul 4, 2000
• Expiry date: Mar 19, 2018

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C2200/30
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A multi-layer color photographic recording material having at least one photosensitive silver halide emulsion layer containing a color coupler contains in at least one photosensitive silver halide emulsion layer a non-diffusing, 2-equivalent color coupler which, under chromogenic development conditions, by coupling with a color developer oxidation product, releases a photographically inert ballast group from the coupling site and so forms a dye removable by rinsing which makes no contribution to color density. In a preferred embodiment of the invention, the non-diffusing, 2-equivalent color coupler which, under chromogenic development conditions, by coupling with a color developer oxidation product, releases a photographically inert ballast group from the coupling site and so forms a dye removable by rinsing which makes no contribution to color density, is a cyan coupler, for example a naphtholic or phenolic coupler, which is preferably located in the most highly sensitive sub-layer of a green-sensitive silver halide emulsion layer unit consisting of two or more sub-layers. The material exhibits an improved sensitivity/grain or gradation/grain relationship.